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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98ede961bb1a56585df820d7f5ab8689ca7d2772577928cc5743eb2120a127cf' 
  AND token = 'FEYx35nHfxqbQ9Eh+4ziV6U30n64nkV+cmwP2dmafJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}